Three-phase voltage sag/swell compensator with phase shifter function based on bipolar matrix-reactance chopper

In this paper is proposed the new topology of AC/AC converter without DC energy storage to compensate deep voltage sags and swells and to control of output voltage phase shift. The proposed solution is intended to protect sensitive loads and energy flow control in AC power grid. The analyzed topology is based on AC/AC ĆukB2 bipolar matrix-reactance chopper. The paper presents an operational description, theoretical analysis and the experimental test results from a 1 kVA laboratory model. The main advantage of the proposed solution, is joining the properties of series AC voltage compensator and phase shifters without DC energy storages. The analyzed converter is ability to compensate single phase voltage interrupt, three-phase 50% voltage sags and swells and change the phase of output voltage in relation to input voltage.